Importing MCADDON with multiple MCPACK = wrong notifications and bad folders name

[Release and Publish 349348]

Summary:
Importing MCADDON with multiple MCPACK inside makes game display wrong notifications (2 times the same if 3 mcpack) and bad folders name (see screenshot)

Repro Steps:
1. Double click PureBDcraft MCADDON
2. Look at the notifications:

• Started importing 128x
• Started importing 64x
• Started importing 32x
• Successfully imported 128x
• Successfully imported 64x
• Successfully imported 64x

3. Look inside folder:
C:\Users\<username>\AppData\Local\Packages\Microsoft.MinecraftUWP_8wekyb3d8bbwe\LocalState\games\com.mojang\resource_packs

4. See the 3 new folders:

• PureBDcraf
• PureBDcraf(1)
• PureBDcraf(1)(1)

Observed Results:

• 1/6 wrong notification
• 1/3 wrong folfer name

Expected Results:

• 6th notification should be "Successfully imported 32x"
• 3rd new folder should be "PureBDcraf(2)"
• IMO: folder names should be longer to avoid the "(1)" most of the time (currently limited to 10 characters)

Screenshots/Videos attached: Yes